package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * ClassName: AutoFillAspect
 * Package: com.sky.aspect
 * Description:
 *  自定义切面类，实现公共字段自动填充
 * @Author: qmh
 * @Create: 2024/12/23 - 20:41
 * @Version: v1.0
 */
@Aspect
@Slf4j
@Component
public class AutoFillAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut(){}

//    定义通知(前置通知)
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始公共字段自动填充");
//        获取到当前方法被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value(); // 获取到数据库操作类型

//        获取到当期被拦截的方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0)
            return ;

        Object arg = args[0];

//        准备数值数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

//        根据当前不同的操作类型，为对应属性通过反射来赋值
        try {
            Method updateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method updateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
            updateTime.invoke(arg,now);
            updateUser.invoke(arg,currentId);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }


        if(operationType == OperationType.INSERT){
            try {
                Method createTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method createUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                createTime.invoke(arg,now);
                createUser.invoke(arg,currentId);
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }
}